Bosch GOL 26 - Operation; Initial Operation; Setting up the instrument and centering the bubble

-6-
Technical Data
Initial Operation
Verify the calibration of
the instrument. Before
initial use, follow the test shown in the
section “Line-of-sight.”
Protect the tool against moisture and
direct sun irradiation.
Do not subject the tool to extreme
temperatures or variations in
temperature. For an example, do not leave
it in a vehicle for long periods. In case of
large variations in temperature, allow the tool
to adjust to the ambient temperature
before putting it into operation. In case of
extreme temperatures or variations in
temperature, the accuracy of the tool can
be impaired.
Avoid heavy impact or dropping of the
tool. After heavy exterior impact on the
tool, an accuracy check should always be
carried out before continuing to work (see
“Leveling Accuracy”).
Setting up the instrument and centering
the bubble
1. Set up the tripod and attach the level
using the tripod mounting screw.
2. Adjust the tripod legs until the tripod
head is roughly level. Center the bubble
within the vial by turning the leveling
screws as shown in Fig. 2.
2a – Turn screws A and B to move the
bubble to the right side.
2b – Turn screw C to center the bubble.
!
WARNING
Automatic Optical Level GOL 32 GOL 26 GOL 24
Material Number 0601068510 0601068010 0601068610
Magnification
32X 26X 24X
Leveling Accuracy
1/16-in at 100-ft
(1.0 mm at 30 m)
1/16-in at 100-ft (1.6 mm
at 30 m)
1/16-in at 100-ft
(1.6 mm at 30 m)
Working Range
Up to 400-ft (120 m)
Up to 330-ft (100 m)
Up to 300-ft (91 m)
Clear Obj. Aperture
36 mm 36 mm 36 mm
Setting Accuracy
±0.3” ±0.8” ±0.8”
Telescope
Image
Erect Erect Erect
Length
8.3-in (210 mm) 8.3-in (210 mm) 8.3-in (210 mm)
Shortest Focusing Length
1-ft (0.3 m) 1-ft (0.3 m) 1-ft (0.3 m)
Field of View
1º30’ 1.5º 1.5º
Stadia Ratio
100 100 100
Stadia Addition
0 0 0
Compensator
Leveling Range
±15’ ±15’ ±15’
Magnet Dampening
Yes Yes Yes
Sensitivity of Bubble
8 min / 2 mm 8 min / 2 mm 8 min / 2 mm
Circle Graduation
1º or 1 Gon 1º or 1 Gon 1º or 1 Gon
Degree of protection
IP54 IP54 IP54
Instrument Net Weight
3.7 lbs. (1.7 kg) 3.7 lbs. (1.7 kg) 3.7 lbs. (1.7 kg)
Mounting Thread
5/8-11 5/8-11 5/8-11
Operation